Air Online Test 6th Science Lesson 10 Questions in English

1. Which of the following statement is correct?
1. Air is present everywhere around us.
2. We cannot see, touch or taste air but we can feel it.

2. Our earth is surrounded by a huge envelope of air called______

3. Atmosphere extends to more than____ km above the surface of earth

4. Which of the following is correct about atmosphere?
1. The atmosphere protects us from many harmful rays coming from the sun.
2. The air envelope is thicker near the earth’s surface and as we go higher the density and the availability of air gradually decreases

5. The decrease in the density of air as we go higher is due to_____

6. The atmosphere is made of____ different layers

7. Arrange the following from top to bottom
1. Troposphere
2. Mesosphere
3. Stratosphere

8. _____ layer is closest to earth

9. Troposphere extends upwards for about________km above the surface of the earth

10. Movement of wind takes place in____ layer

11. Which of the following is incorrect?
1. Troposphere contains water vapour, which is responsible for making clouds.
2. Exosphere is responsible for the weather we experience on earth.

12. Aircrafts usually fly above_____ layer to avoid strong winds and bad weather.

13. The stratosphere lies above______

14. In which layer ozone layer is located?

15. Which of the following statement is correct?
1. The ozone layer protects all life on earth from the harmful ultraviolet rays of the sun.
2. Troposphere layer has the ozone layer in it

16. A weathercock shows_____

17. Until____ century, human thought ‘air’ as a fundamental constituent of matte

18. Joseph Priestley in______ showed that “air is not an elementary substance, but a
composition,” or mixture of gases.

19. Priestley was also able to identify a colourless and highly reactive gas which was later Named____ by the great French chemist Antoine Lavoisier

20.______ showed that sunlight is essential to the plant to carry out photosynthesis

21. Daniel Rutherford, a Scottish chemist, discovered______

22. Who was able to produce a gas, which showed the same property of the air without oxygen and carbon-di-oxide?

23. Bubble some air using a straw through the limewater, lime water will produce a white Precipitate, this shows the presence of________

24. The major component of air is____

25. Almost____ of air is nitrogen.

26. About_____ of air is oxygen.

27. What is the % of nitrogen?

28. What is the % of Co2 inhaled during respiration?

29. What is the % of Co2, Ar, water vapour and other gases?

30. Which of the following statement is correct?
1. Air in coastal areas may have more water vapour than inland areas.
2. Air also contains more water vapour in rainy season.

31. Which of the following is correct?
1. When we burn a candle, paper, kerosene, coal, wood or cooking gas (LPG), oxygen is needed.
2. The oxygen needed for the burning of candle, paper, kerosene, coal, wood and cooking gas comes from the air around us.

32. Which of the following is incorrect?
1. For burning a substance continuously so as to make fire, a continuous supply of fresh air is needed
2. If we cut off the supply of fresh air to a burning substance, then the burning substance will not get oxygen necessary for burning to continue and hence the substance will stop burning.

33. If the process does not emit flame then it is called______

34. The process of burning of a substance in the presence of oxygen and releasing a large
amount of light and heat is called_____

35. In rockets along with the fuel___ is also carried for combustion.

36. Which of the following is correct?
1. Plants require energy for their growth and hence respiration also occurs in plants.
2. During respiration, plants take in oxygen and release carbon–di–oxide, just as animals do.

37. Gaseous exchange with air in atmosphere takes place in plants with the help of tiny holes
called__________

38. Plants manufacture food by a process called______

39. Most plants possess a_____ pigment called chlorophyll

40. Which of the following statement is incorrect?
1. Plants release oxygen during photosynthesis which is much more than the oxygen consumed by the plants, during respiration.
2. Most plants possess a green pigment called chlorophyll and it is also used-up in the process of photosynthesis.

41. Energy is required to carry out many processes in the body such as
1. Growth
2. Movement
3. Repair

42. Which of the following statement is correct?
1. Process by which oxygen reacts with digested food to form carbon-di-oxide, water vapour and energy is called respiration.
2. Carbon-di-oxide formed during respiration dissolves in the blood and is exhaled out of the body through the heart

43. Food + Oxygen >>>>
1. C02
2. Water
3. Energy
4. N2

44. Inhaled air contains more___ while the exhaled air contains more_____

45. Which of the following statemen is correct?
1. The water of ponds, lakes, rivers and seas have some amount of dissolved air containing oxygen in it.
2. The plants and animals that live in water use the oxygen dissolved in water for breathing

46. When carbon-di-oxide is cooled to___ degree C, it directly becomes a solid, without
changing to its liquid state?

47. Which of the following is called as dry ice?

48. Which of the following statement is incorrect?
1. Compressed air is used to fill tyres of various kinds of vehicles
2. Air plays an important role in maintaining the water cycle in the nature.